Breakdown of Студенты начали вскакивать со своих мест.
студент
student (m)
место
place, seat
свой
one's own
начать
to begin (perfective)
с
off / down from (a surface)
вскакивать
to jump up (impf)
Questions & Answers about Студенты начали вскакивать со своих мест.
Why is the upward prefix here вс- instead of вз-?
The prefix for upward motion is usually вз- (like in взлететь - to fly up). However, it changes to вс- when the root word starts with a voiceless consonant (like the sounds k, p, t, s, or f). Here, the root verb is related to скакать (to jump/skip), which starts with a voiceless 'с', so вз- changes to вс- to make it easier to pronounce: вскакивать.
Why is the imperfective verb вскакивать used here rather than the perfective вскочить?
In Russian, phase verbs—verbs that describe the start, continuation, or end of an action (like начать, продолжать, закончить)—must always be followed by an imperfective infinitive. Because we used начали (they began), we are strictly required to use the imperfective вскакивать, even if the jumping itself was a sudden, quick action.
Why does the sentence use со instead of just с for "from"?
The preposition с (which takes the genitive case when meaning "from" or "off of") becomes со before words starting with certain tricky consonant clusters, especially those starting with с or з. Since the next word своих starts with св-, the "о" is added so you aren't forced to pronounce an awkward "с св-" sound.
Could we say "с их мест" instead of "со своих мест"?
No, it has to be своих. In Russian, when the subject of the sentence (the students) is interacting with their own possessions or assigned items (their seats), you must use the reflexive possessive pronoun свой (in the correct case and number). If you said их мест, it would mean the students were jumping up from someone else's seats!
Why is the word for "seats" just мест?
мест is the genitive plural form of the neuter noun место (seat/place). We need the genitive case because of the preposition с/со (from), and we need plural because there are multiple students and seats. To form the genitive plural of neuter nouns ending in -о, you generally just drop the final vowel, leaving мест.
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